#include<stdio.h>
#include<stdlib.h>
#include<errno.h>
#include<string.h>
int main(void)
{
	FILE *fp;

	fp = fopen("tmp","r");
	if(fp == NULL)
	{
		fprintf(stderr,"fopen():%s\n",strerror(errno));
		exit(1);
	}
	
	puts("ok!");
	exit(0);
}
